Summary:
- The Moon's birth and early history reveals a great deal about Earth’s early days.
- The Genesis Rock, with a date of 4.5 billion years, is only about 100 million years younger than the solar system.
- Earth and Moon are very similar in composition.
- Earth has a faster spin than it should have for a planet of its size and distance from the Sun.
- Earth was struck by a giant asteroid that melted the planet and asteroid and flung material into orbit where it coalesced to become the Moon.